Compressor



Dec. 6, 1932 R. T. SMITH ET AL 38 COMPRESSOR Filed April 15, 1951 5 Sheets-Sheet l INVENTQRS I%;VEY

Dec. 6, 1932.

R T. SMITH ET AL COMPRESSOR Filed April 15, 1951 1 .4 I'm/WE y 5 Sheets-Sheet -2' INVEN'IOR! Dec. 6, 1932. R. T. SMITH ET AL COMPRESSOR Filed April 15, 1931 5 Sheets-Sheet 3 IN VENTORJ' (Si/gm 223 Dec. 6, 1932. R T. SMITH ET AL 1,890,238

COMPRESSOR Filed April 15. 1951 5 Sheets-Shed 4 1 M NTOR: U I kw a. M. 9m,

j A w ATTORN R. T. SMITH ET AL COMPRESSOR Dec. 6, 1932.

Filed April 15. 19:51 5 Sheets-Sheet 5 l NTORS MMAJMW ATTORNE Patented Dec. 6, 1932 UNITED s'11.\'1"1-:s

PATENT oFF cE RUSSELL '1. SMITH AND CHARLES H. SMITH, OF GREZENV'ILLE, MICHIGAN, ASSIGNORS TO GIBSON REFRIGERATOR COMPANY, OF GREENVILLE, MICHIGAN, A CORPORATION OF MICHIGAN COMPI tESSOR Application filed April 15, 1931. Serial No. 530,252.

This invention relates to compressors and -more particularly to compressors for use in refrigeratlng systems where1n the vapors to be compressed contain entrained lubricating oil, a large proportion of which is to be separated from the vapors before compression takes place.

An object of this invention is a novel form of compressor which includes a casing havlng an open end adapted to be closed by a wall of an associated prime mover, the latter and the compressor having a common shaft which projects thru the compressor closure wall, there being a bearing and seal to seal the shaft to the wall.

A still further object is a compressor having orifices, ports and walls so arranged that vapors are conducted from the compression inlet to the compression outlet in such a mani I ner that separation of the entrained oil from the vapors will take place before the vapors are introduced into the compression cylinders.

A still further object is a, compressor having moving parts therein which can be read- 2-2, s 3, 4-4, 5 5, and 66 of Figs. 1, 2,

1, 2, and 4 respectively.

C'ompre ssor casing Referring to the drawings and more particularly to Fig. 1, it will be seen that the compressor includes a cylindrical casing 10 having on one end an integral wall 12 and on the other a wall 14 formed as part of the motor enclosure 16, there being bolts 17 for securing the casing to the wall.

The motor enclosure is provided with a bearing 18 for the shaft 20, the latter being journaled in the rfompressor at 22. A comhined bearing and seal construction indicated only connections into and out of the compressor casing are the low pressure inlet, the high pressure outlet, and the oil drain, all of which will'now be specifically described.

The low pressure inlet which is connected to the evaporator, not shown, is referenced 26 generally, and includes anelongated hollow sleeve fitting 28 threaded into the bored and threaded extension 30 of the wall 12. The fitting is provided with a side orifice 31in which is disposed the end of a tube 32 leading from the evaporator, and the end of the fitting is closed by a plug 34 and a 'cap 36, both of which are threadedly and sealingly secured to the fitting. u

' The high pressure outlet as shown, includes nothin more than an outlet orifice 38 connected by a transverse passage to the interior of the compressor casingand having threads 42 by means of which an outlet fitting. of any desired form may be connected to the casing.

The oil drain includes an outlet orifice 44 in the bottom of the casing 10, there being an oil plug 46 disposed within the orifice and threaded as at 43 so that it is securely held in its place in the casing.

' Moving parts Within the casing are the moving parts of the compressor these including the-shaft, the pistons, the connecting rod and the eccentric and counterweight, all-of which Will now be specifically described.

Referring particularly to Figs. 1-4 incluconnecting rod 7 6. The shaft end of the rod is in the form of a large ring 78 receiving the circular eccentric 82- formed integral with the counterweight 83 and the sleeve 84, and the eccentric and counterweight, together are locked to the shaft 20 by the mutual threads generally at 24 seals the compressor casing to 4 86, engaging the sleeve. Further, the ring the shaft and from the atmosphere, and the from a large percentage of the entrained oil:- will take place, the oil dropping into the 78 is provided with an extension 87 in the form of a lubricating dipper or splasher.

The assembly of the moving parts Within the casing is efl'ected as follo s: I The pistons are introduced into the casing thru the compression cylinders 88. The piston 61 is withdrawn partially, and the connecting rod is introduced into the compressor thru the open end where the wall 14 is to be located, and it is then connected tothepist-on by the wrist pin 72. Then the casing, containing the pistons and the connecting rod, is brought-to amotor casing from which projects the end of a shaft 20, the latter already being provided with the eccentric and counterweight. The shaft end of the connecting rod is then passed over the eccentric and the parts are properly aligned. Theicasing is thenbolted to the wall by the bolts, and the assembly is completed. i Those formations of the casing, .which serve to conduct the vapors togetherwith the entrained oil from the low pressure inlet to the high pressure outlet, during compression, will now be described in detail.

The shaft 20, as indicated on .Fig. 1, is provided with into which the vapors are conducted thru the inlet 26 andfrom which the vapors escape into thecasing thru the shaft orifices 92, the eccentric orifices 93, and the ring grooves 94. At this point separation of the gases lower portion of the casing 10, where itis to be agitated and splashed for purposes of lubrication, the vapors continuing in their path to theupper portion of-the casing immediately beneath thepartitio-n 96. v From this point the gases escape thru passages 98- and 99 and into the transverse passage 100.

From this passage .(Fig 6) the gases are conducted into the compressor cylinders 88' there being orifices 101 and'arcuate slots 102 connecting the passage 100 with compressor cylinders 88. With gases so disposed within the compressor cylinders,

the pistons move to their compression points. First they close the slots 102' (Fig.- 4) thus creating a closed'chamber in the compression cylinder, the exhaust valves 108 in the cvlinder heads 109'being held closed by the high compression spring 112. Compression takes place and when the compression has-reached" a desired point, the plate portions 114 of the exhaust valves 108 are raised from the bodies of the valves by the pressure of the gases, the

' I latter then passing thru the minute apertures 116 and into the ports/120. Fromhere the compressed va from where they go thru the See,Fig. 5). .ors pass into depressions 121 of the cylinder heads '109, head passages 122 (Fig. 2) into thetransverse passage 126. The latterconducts the vapors to the outlet,

ahollow or bored portion it being connected the 'outletorifice 38, previously described.

Now having described the invention and I the preferred embodiment thereof, it is to be understood that the said invention is to W be limited, not to the specific details herein set forth, but only by the scope of the claims which follow.

What we claim is:

1. In a compressor, a casing having a bored, 4'5

end wall, a rotating shaft journalled in the bore, -an inlet opening in the wall and in come munication with the bore therein, the adjacent end of the shaft being hollow and open to the bore continuously, and'also to 50 the interior of the casing, the openings from casing, a bearing and seal constructi0n vfor sealing-the shaft to the wall, and a: sleeve secured to saidshaft so as to rotate therewith,

said sleeve being provided with integral formations including a counterweight and an eccentric.

'3. In a. compressor, a rotating shaftlprojecting thru an end wall of the compressor casing, a bearing and seal construct on for sealing the shaft to the wall, and a sleeve secured to said shaft so as to'rotate therewith, said sleeve being provided with integral for mations including a counterweight and an eccentric, a connecting rod having on one end a ring surrounding and operative on 581d eccentric, and having a wrist pin and piston on the other end, the ring end of the rod having a dipper like formation lubricating fluid in the casing.

41. In a compressor, bored end wall, a rotating shaft journalled in the bore, an inlet openin in the wall and in communication with the%) adjacent end of the shaft being hollow and open to the-bore continuously, an. eccentric on said; shaft and having openings therethrii commumcatmg with the interior of the shaft thru an opening in the latter, and with the 5. In a compressor, a casing having a bored 0 end wall, a rotating shaft journalled in the bore, an inlet opening in the wall and in communication with the bore, therein, the adjacent end of the shaft being hollow and opening to the bore continuously,'an eccentric 125 'on said shaft; thru an opening in the latter,

and with the interior of the casing, fluid within the shaft emerging thru the shaft and eccentric.openings to lubricate moving parts of the compressor; including a. connecting them in their 85 for agitating a casing having a,

ore therein, they no interior of the casing, the shaft and eccentric rod journalled on said eccentric, the eccentric being formed as part of a sleeve, locked to the shaft so as to rotate therewith, and including a counterweight.

6. In a compressor, a casing, a rotating shaft projecting thru an end wall thereof, a bearing and seal construction for sealing the shaft to the wall, a sleeve secured to sai shaft so as vto rotate therewith, a counterweight and an eccentric formed integral with i said sleeve, and a connecting rod journalled 'on said eccentric.

7. In a compressor, a casing having a bored end wall, a rotating shaft journalled in the bore, the wall having an inlet opening in communication with the bore therein, the adjacent end of the shaft being hollow and open to the bore continuously, a sleeve locked to the shaft so as to rotate therewith, an eccentric on said sleeve and having openings therethru communicating with the interior of the shaft thru an opening in the latter. and with the interior of the casing, a counterweight on said eccentric, the shaft and eccentric openings permitting fluid within the shaft to emerge and lubricate moving parts of the compressor.

In testimony whereof, we sign this specification.

RUSSELL T. SMITH. CHARLES H. SMITH. 

